Mechanical laboratory methods; a testing of instruments and machines in the mechanical engineering laboratory and in practice (1918)
Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 71
ving to bring it back upon the return stroke.Thus the motion of the drum is proportional to the engine pis-ton and therefore to the volume in the engine cyhnder behind djthe piston. The diagram made by the pencil point on the recordpaper is one of pressure shown vertically and volume (or… … Fig. 31.—EngineIndicator. 1 10 THE ENGINE INDICATOR 51 indicated horse-power may be calculated. (See Test 43.) Fig.32 is a typical indicator diagram from a steam engine. Theaverage pressure on the forward stroke is the mean height, toscale, of the curve ahc. On the return stroke, the average…
Mechanical engineering laboratories
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